Vaniver and DaFranker have both offered sensible, practical, down-to-earth advice. I, on the other hand, have one word for you: Airship.

Consider seating logistics, and experiment with having different people decide who sits where (or next to whom). Dinner parties tend to turn out differently with different arrangements, but different subcultures will have different algorithms for establishing optimal seating, so the experimentation is usually necessary (and having different people decide serves both as a form of blinding and as a way to turn up evidence to isolate the algorithm faster).

Consider eating Roman-style to increase the intimacy / as a novel experience. Unfortunately, this is made way easier with specialized furniture- but you should be able to improvise with pillows. As well, it is a radically different way to eat that predates the invention of the fork (and so will work fine with hands or chopsticks, but not modern implements).